Permutation-padlock.



A M .,J. LOVETT. PERMUTATION PADLOGK. APPLIUTION FILED 0,0T. 23, 1911.

Patented June 4, 1912.

lla Attorneys K by Y' Y I y c MORRIS J. LOVETT, OF RANDSBURG, CALIFORNIA.

PERMUTATION-PADLOCK.

speication of Letters Patent.

Patented J une/1, 1912.

Application filed -October 23, 1911. Serial No. 656,149.

To all whom' t may concern:

Be it known that I, MORRIS J. Lovn'r'r, a citizen of the United States, residing at Randsburg, in the county of Kern and State of California, have invented a new and useful Permutation-Padlock, of which the following is a specification.

It is the object of the present invention to provide, in a permutation pad-lock, a novel means lfor operatively connecting the shackle with the tumblers.

A further object of the invention is to provide novel means for changing the com-V bination of the padlock.

A further object of the invention is to provide novel means for controlling;V the sliding movement of the shackle.

The invention aims, moreover, to improve generally, and to increase the utility of, devices of that class to which the present invention appertains.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the com-` bination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawings,-Figure 1 shows in elevation, one of the parts of the casing of a lock, the operative elements of the lock being shown in place in this part of the casing; Fig. 2 is a side elevation of the lock, parts being sectioned; Fig. 3 is a transverse section upon the line 3-3 of Fig. 1, parts appearing in elevation; Fig. 4 is an elevation of one of the tumblers; Fig..5 is a fragmental perspective of the shackle and of the finger which is carried by the shackle; and Fig. 6 is a fragmental perspective of one end of the shackle controlling spring.

In carrying out the invention there is provided a casing 1, preferablycomprising distinct parts 2, united by countersunk rivets 3, or in `any other suitable manner, the rivets 3 registering in openings 4 in the parts 2. The parts 2 are duplicates,and but one of them will be described, it being understood without further explanation, that the description applies with equal propriety to both parts 2.

vEach part 2 is equipped in its upper edge chamber 9, the finger chamber 9 at its inner end communicating with an enlarged tumbler compartment 10, located parallel to the shackle-receiving groove 6 and extended to- Ward the top of the casing 1. vAt the sides of the tumbler compartment 10 are bearing grooves '11, disposedV at right angles to the shackle-receiving groove 6.y

Whenthe two parts 2 of the casing 1, constructed as above described, are bound together by the securing rivets 3,the tumbler shaft 12 is journaled for rotation in the kbearing grooves 11, the shaft extending through the tumbler compartment 10. If

desired, alsupplementa'l bearing 14, located 1n thevtumbler compartment 10, and connected with one of the parts 2, may receive for rotation, the inner end of the tumbler shaft 12, although the provision of this bearing 14 is amatter of secondary consequence. Mounted to rotate upon'the' tumbler shaft 12 and located within the tumbler compart-y ment 10, are tumblers 15 and 16',V provided with spacing hubs 17, there beinginterengaging, lateralprojections 18 upon the tumblers 15 and 16.4 The tumblers 15 and 16 are peripherally notched, as shown at 19 in Fig. 4, inconnection with the tumbler 16, the

relative positions between` the notches 19 and i the projections 18 being fixed as thetaste of the manufacturer may direct.

The outer end of the tumbler shaft 12 is threaded as shown at 20, to receive a nut 21, ,u

adaptedto clamp a tumbler 22 against a shoulder 23 which is fixed upon the tumbler shaft 12. Since the tumbler 22 is secured to the tumbler shaft 12, this tumbler may be considered as the fixed tumbler, the tumblers 15 and 16, which are rotatable upon the tumbler shaft 12, being considered as the movable tumblers. The fixed tumbler 22 and the movable tumbler 16 are equipped with interengaging lateral' projectionsl 2 4. The

fixed tumbler 22 is peripherally notchedVas will be readily understood from an inspection of Fig. 1, the notch 19 in the tumbler 16 serving to illustrate with equal propriety,

. the tumbler shaft 12 is a graduated dial 25,

. be described hereinafter.

adapted to coperate with the dial 26 formed upon the outer face ofthe casing 1, the dials 25 and 26 being graduated -in any desired manner. The extremity ofthe tumbler shaft 12 terminates in an operating knob 27. Y

The shackle, denoted generally by the ynumeral 28 is -mounted for rotation and for longitudinal sliding movement in the mating shackle-receiving grooves 6. The free end v29 of theshackle 28 is received within the mating seats 5, when the shackle vis in locked position. Pivotally connected with thelower extremity of the shackle 28, Vas shown, at 30, is a rectangularlydisposed finger 31. The shackle 28is adapted to rotate in the finger 31, but when the shackle 28 is movedlongitudinally, the finger 31 will move transversely, along with the shackle. The finger 31 is housed in the finger chamber 9 and protrudes across the tumbler compartment 10. When the shackle28 is drawn upwardly, the finger 31 ywill enter the notches 19, inl the tumblers 15, 16' and 22, when the notches are alined in a manner to Under such circumstances, the end 29 of lthe shackle 28 may be withdrawn from the seat'5, permitting the shackle 28jto be swung into the open' position shown-in Fig. 1. When, however, the shackle is thrust downwardly, to remove the finger 31 from the4 grooves 19 in the tumblers 15, 16 and 22, the end 29 of the shackle 28 will be held in the seat 5, when .the tumblers 15, 16 and 22, or any one of them, is rotated so that the periphery of one tumbler, instead of the notch 19 of such tumbler, engages with the finger 31. l

4 The shackle 28 is provided with a circumscribing groove 32, adapted to receive one end 33 of a spring plate 3l,`the opposite'end of which -is wedged and bound in the diminished end of the spring space 7 The shackle 28 is equipped with a radial lug 35 which is adapted to enter the annular stop opening 8.

In practical operation, the knob 27 is seized, and the -tumbler shaft 12 is rotated, the tumbler shaft carrying with it, inv its rotation, the fixed tumbler 22. The interengaging elements 24; of the tumblers 22 and 16 and theinterengaging elements 1S of the tumblers 16 and 15 will cause the notches 19 in all of the tumblers to be alined, this alining of the notches 19 in the several tumblers being readily secured by noting the proper combinations upon the dials 26 and 27. This operation is common and well YVknown,.and need not be entered into specifically, so far as ,describing any particular combination is concerned.'

,Y The shackle 29 is normally held in locked position by reason of thel fact that the peripherie's of the tumblers 22, 16 and 15 engage the finger 31 and hold the end 29 of the shackle 28 in 'therseat 5. lVhen, however, the notches 19 in the several tumblers are alined, in the ,manner her-einbefore described, the shackle 28 may lbe lifted, AIVthe finger 31 moving into the alined notches of the tumblers, and the end -29 ofthe shackle 28 beingwithdrawn Y'from the seat '5, whereupon the shackle may fbe rotated li-nto the open position shown in fFig. 1. llVhen the shackle 28 is lifted, to -remove the-end 29 from the seatV 5, the `spring311'u'ffill be put under tension. At t-he lsame time, when the shackle 28 is rotated, the lug i35 of ythe shackle 28 will pass ,into the stop opening 8 andhold the shackle 28velevated.

When nit is desiredfto'place-the device in n locked position, the Ashackle 28 is rotated from thev position shown in Fig. 1, until the end 29 of the shackle 28'is7above the lseat 5, whereupon, when the, shackle -28 moves downwardly,thelug 35will ride out ofthe stop V opening -8 and pass into the lspring space 7, the spring 311-acting toth-rustfthe shackle 28 downwardly, into a locked lposition. This `movement of theshac'kle 28 will depress the finger 31 out ofthe alined notches 19 in the tumblers 22, 16 and 15, whereupon if the tumbler shaft 12 be1 given aturn or two, Ainv either direction, one yor a'll off the tumblers 22, 16 and 15 will Vfbe rotated, so that `their notches ,19 are Ano longer -alined The finger 31 will thus fbe'held in theposi- Y tion to which it hasbeen moved yby .the ac tion ofthe spring 34, andthe-end 29 ofthe shackle will be held in :tl-ie seat 5.

VAs will be readily understood, the combination may be changed 'by loosening the fl hold ofthe -nut 2-1 upon the ltumbler 22, whereupon the tumbler 22 Lmay vbe A`rotated into any desired position upon `the tumbler shaft 12. Subsequently, thenut 21 maybe rotated to "bind the tumbler 22 in itsfadjusted position, against `the shoulder 23. Noting the relatively 'large number of grad'- uations upon the dials 25 4and 2`6,=it will be understood readily that. a .great variety lof linger moves transversely; the linger co-' operating With the casing to maintian one end of the shackle permanently in the casing. p

2. A permutation pad-lock comprising a casing; a shackle slidable and rotatable in the casing; a finger mounted upon the shackle to slide With the shackle, the shackle being rotatably connected with the finger, and theiinger being held, by the casing, against rotation With the shackle; a tumbler mounted for rotation in the casing and having an opening to receive the nger; and spring means engaging the shackle, to move the finger out of the opening. I

3. A permutation pad-lock comprising a casing having a shackle-receiving opening, the casing being provided With a spring space, communicating with the shackle-receiving opening, there being a stop opening communicating with the shackle-receiving opening and With the spring space; a shackle mounted to slide and to rotate in the shacklereceiving opening; a spring mounted in the spring space and engaged at one end With the shackle to slide the same, there being a lug upon the shackle, adapted to register in the stop opening, to hold the shackle against lsliding movement and to maintain the MORRIS J. LovE'r'r.

Witnesses:

FRANK VAN PELT, JAMES MONTGOMERY.

Copies of this patent may be obtained for live cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

